Tube couplers for BT-20 (18mm) tubes. - 0.625", - 0.705",  2"

Tube couplers for BT-50 (24 mm) tubes. - 0.91", - 0.945",  1.75" We also offer BT-50 couplers with tight fit. If you need to permanently glue...

Tube couplers for BT-55 tubes. - 1.245", - 1.28",  2"

Tube couplers for BT-60 tubes. - 1.55", - 1.6",  2"

Tube couplers for BT-70 tubes. 2 Pack - 2.075", - 2.160",  3",  11 g

Tube couplers for BT-80 tubes. - 2.474", - 2.554",  3",  12 g

Tube coupler for 1.6" (38 mm) tubes. - 1.44", - 1.528",  4",  8g

Tube coupler for 1.72" tubes. - 1.595", - 1.655",  4.5",  11g This coupler has the same ID as BT60 and can be used as a thick-wall BT60...

Tube coupler for 1.9" tubes. - 1.635", - 1.805",  4",  18g

Tube coupler for 54mm tubes (54 Motor Mount). - 2.075", - 2.135",  5",  14g